Cody

Problem 1237. It's race time! Write a faster function than the test suite call of unique().

Solution 199693

Submitted on 2 Feb 2013 by Muthu Annamalai
This solution is locked. To view this solution, you need to provide a solution of the same size or smaller.

This solution is outdated. To rescore this solution, sign in.

Solve This Problem View on Solution Map

Test Suite

Test Status Code Input and Output
1   Pass
%% x = rand(100000, 1); tic y_correct = unique(x); t_unique = toc tic y_myunique = my_unique(x); t_myunique = toc assert(isequal(sort(my_unique(x)),y_correct) && t_unique > t_myunique)

t_unique = 0.0530 t_myunique = 0.0150

2   Pass
%% x = rand(10000, 1); tic y_correct = unique(x); t_unique = toc tic y_my_unique = my_unique(x); t_my_unique = toc assert(isequal(sort(my_unique(x)),y_correct) && t_unique > t_my_unique)

t_unique = 0.0015 t_my_unique = 9.9100e-04

3   Pass
%% x = [1:100000 2 3 4]; tic y_correct = unique(x); t_unique = toc tic y_my_unique = my_unique(x); t_my_unique = toc assert(isequal(sort(my_unique(x)),y_correct) && t_unique > t_my_unique)

t_unique = 0.0068 t_my_unique = 0.0066

Suggested Problems

More from this Author7